Cancer may not be man-made but we sure as hell helped it along.
It is man-made actually. Or made in any creature who develops it. Its a classic example of uncontrolled mitosis. There are more carcinogens in the world today sure. There are also more anti-cancer drugs. We didn't realise the carcinogenic properties of these chenmicals when we made them but anti-cancer science as a whole is making a very strong effort to repair that. A hell of a lot of carcinogens have been banned now too.
As to the growing of tumours on mice. Its necessary to estimate drug penetration and distribution in tumours. Also they are rarely painful and rarely metastatic. The mouse is euthanised before it spreads usually. Doing experiments on animals with fully malignant tumours is usually innacurate unfortunately.
Many cancers were not DISCOVERED before 'civilisation' came along, get your facts right. Also most people didn't live long enough to develop enough gene mutations for cancerous growths to begin. Its a disease of the old. Check the statistics.
As allways I agree with you on the fact that a lot of animal research is unnessasary. Until companies are forced to change they will do what is cheapest. Fact of life. Same with battery farming. Do you honestly think I want to eat a burger from a cow farmed in that way? Its too hard to tell unfortunately. <img src="/ubbthreads/images/graemlins/disagree.gif" alt="" />
People are allways more outraged over someone eating a dog or a cat instead of a pig because they are cute. This makes me think of the hillarious dialogue between Samuel L. Jackson and John Travolta in the diner at the end of pulp fiction.
"That would have to be one charming motherf#cking pig!" <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" />
